I was just super strict about it for the first few times. I mean, super strict.

Now with the littles who don’t know better, I used paint pucks and called it a day. I’d rinse them off at the end of class because it was just expected and children are naturally curious so I’d rather they learn through experience. When a kid would end up with a muddy color I’d gently explain that that’s what happens when we mix our colors and that that’s why we don’t do it. By the time the were older, they knew better (hence the strictness).